Solve the following:
Q: A random sample a 16 Google managers yield the following information on annual salaries. The sample mean is $69,000, with a sample standard deviation of $4,000. What is the mean salary of all Google managers? What is the 95% confidence interval for the population mean?
Confidence interval - mean
95% confidence level
69000 mean
4000 std. dev.
16 n
2.131 t (df = 15)
2131.450 half-width
71131.450 upper confidence limit
66868.550 lower confidence limit